Ralph d



H. D. MERSHON.

ELECTRODE FOR ELECTROLYTIC APPARATUS.

APPLICATION FILED APR. 2. 19u.

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@afg @r1-fur Maya-@WL UNITED sTATEs PATENT oEEioE. V

RALPH D. MERSHON, 0F NEW YORK, N. Y.

ELECTRODE FOR ELECTROLYTIC APPARATUS..

Application filed April 2,

To .all whom t may concern: y Be it known that I RALPH D. MERsHoN,acitizen of the United tates, residing at Newl .-York, county and Stateof New York, have vobject isto provide an electrode of aluminum or othersuitable metal, having for eX- bends, as at 11.- Preferably7 p'osure tothe electrolyte a superficial area which is large in proportion to thebulk of the electrode. Another object is to provide an electrode thatnot only has the largel superficial area indicated, but which alsopossesses the mechanical strength needed to meet the various conditionsofactual use. To thesey and other ends vthe invention consists in thenovel features hereinafter described.

One form of the invention is illustrated in the accompanying drawing, inwhich- Figure 1 is an elevation of the electrode.

Fig. 2 is al vertical section on line 2 2 of Fig-1.

Fig. 3 is a horizontal section on line 3-3 of Fig. l'. l

Fig. 4 is a detail perspective View.

My improved electrode consists essentiall of a crimped plate 10 of sheetmetal, preferably very thin sheet metal, say a few thousandths of aninch thick, surrounded and carried by a suitable supporting frame.

As stated, the plate 10 is crimped, that is, it is corrugated in form,the folds, crimps, or corrugations being deep and close together but outof contact with each other throughout their length, andtheir sides areAsubstantially parallel to each other. Pref- Fig. 3. To facilitatecirculation of the elec- I trolyte and flow of current through the samewhen the electrodes are in use the crimps ,or folds are perforated attheir the perforations are mere slits, with their edges spread apart asindicated in Fig. 4, to enlarge the openings. this way apertures of goodsize are obtained without diminishing the area of the metal exposed tothe electrolyte as would be Athe case if parts of the metal wereactually punched out.

1917. Serial No. 159,146.

The crimped plate may be made all in one piece, but it is moreconvenient to make it in two or more sections, for instance three, asshown in Fig. 1.

The supporting frame ispreferably all 'metal, and in the form shown itconsists of vertical angle bars forming side members 12, and upper andlower cross members 13, riveted or otherwise fastened together. To

.increase the stiffness of the cross members they are slotted at theends, as at 14, and the intermediate portions are bent to give them acurved cross section, as shown in Fig. 2. The edges of these bentportions may project beyond the surface of the late 10 so that when theelectrode is laid own on a table or other flat surface the crimped platewill not come in contact therewith. The ianges on the side bars l2,extending Specification of Letters Patent. Patented Dec, 23, 1919,.

oppositely to the bent portions of the cross members, perform alikefunction forV the other side of the plate. v

For the purpose of holding the plate 10 securely in the frame the inneredges of the upper and lower members 13 are seated in slots 15, Fig. 2,in the upper and lower edges of the plate. l

Electrical connection of the crimped plate with the external circuit ispreferably made through the supporting frame. purpose at lea-st onemember of the frame is made of metal, preferably the upper cross member,and the terminals of the 'crimped plate are welded or soldered thereto.rThese vterminals can be conveniently formed by cutting strips 16 fromthe edges of the final folds at the sides of the plate sections. Theterminal strips thus provided are bent up and inserted in slits 17 cutin the upper cross member'of the supporting frame and are soldered orwelded thereto; By preference the slits are formed in tongues 18 cut outof the bent portions of said cross members so that the strips will begri ped bv the spring pressure 'of the two ha ves of the vtongues aswell as by the soldered or welded connection therewith. i

The Hat end portions or ears 19 or the upper and lower cross membersafford convenient points 4for grasp by 'supporting- For this vtioned,say) a few thousandthsof an inch, composed of aluminum or .similarmetal, is so easily deformed that it-has heretofore been difficult ifnot impossible to vuse metal of -such thinness, inasmuch as whenarranged side by side in the electrolyte the plates are apt to bulge atthe center or bend at the edges and thus come'into contact one with ianother. But by mounting each plate in a separate frame, as describedabove, thel in-v dividual plates aremade practically rigid 'and theproper spacing and separation in `the electrolyte is easily maintained.Moretribution of the heat generated in the apparatus, and also tofacilitatethe freeing of bubbles from the surface of the plates.

-It'is to be understood that the invention is not limited to thespecific construction herein described, but can be embodied in otherforms without departure from its spirit.

I claiuu-v 1. An electrode for electrolytic appara' tus, comprising acrimped plate of sheet metal having apertures extending across theycrimps or folds, and a supporting frame surrounding the plate, havingcrossf members extending through said apertures to support the plateinsaid frame.v

2. An electrode for electrolytic apparatus, comprising a crimped orfolded plate of sheet metal having slots extending across the crimps orfolds, and a supporting frame surrounding the plate, having crossmembers arranged with their edges seated in said slots to support theplate in said frame.

3, An electrode for electrolytic apparatus, comprising a crimpedorlfolded plate of V-sheet metal, a supporting frame surrounding andsecured to the crimped plate and having a metallic member, and one ormore terminal strips extending from the crimped late and welded to thesaid metallic memer to afford electrical connection therewith. l

4. A n electrode for electrolytic apparatus, comprising a crimped plateof sheet' metal, a supporting frame' surrounding and secured to theplate and having a metallic member, and one or more terminal stripsintegral with the plate andwelded to the said metallic member.

5. An electrode for electrolytic apparatus, comprising a'crimped orfolded plate of sheet metal having apertures in the bends of the crimpsor folds.

v6. An electrode for electrolytic apparatus, comprising a crimpedorfolded plate ofl sheet metal having slots in its edges across the crimpsor folds, a supporting frame surrounding the plate having vertical andcross-members the latter arranged with their edges seated in said slotsto hold the plate in the frame, at least'one of the members of p plateand the metallic member.

` the frame being metallic, and a welded con- .nection between the 7. Anelectrode for the purpose described,

Vthin sheet metal having closely spaced folds the sides of which are'parallel, and a rigid l` frame surrounding the crimped `sheet andserving to maintain the same in proper form'.-

In testimony whereof I hereunto aiiix my signature. l A

RAL-tra n. Maestros.

